A 28 Years old white female presents with a 15-day history of malodorous vaginal discharge and pruritus. She reports that the smell is worse after intercourse and is accompanied by a white discharge. No significant medical or gynecological history. She is in a stable monogamous relationship and has never been pregnant. Which of the following diagnostic features is consistent with Bacterial vaginosis?
A 28 Years old white female presents with a 15-day history of malodorous vaginal discharge and pruritus. She reports that the smell is worse after intercourse and is accompanied by a white discharge. No significant medical or gynecological history. She is in a stable monogamous relationship and has never been pregnant. Which of the following diagnostic features is consistent with Bacterial vaginosis?
💡 Explanation
**Core Concept**
Bacterial vaginosis (BV) is a common vaginal infection caused by an imbalance of the normal vaginal microbiota, leading to an overgrowth of anaerobic bacteria. This condition is characterized by an increase in vaginal pH, the presence of clue cells, and a characteristic fishy odor.
**Why the Correct Answer is Right**
The correct answer, **B**, is consistent with BV due to the presence of clue cells on the smear. Clue cells are vaginal epithelial cells that are coated with bacteria, indicating an overgrowth of anaerobic bacteria. The vaginal fluid pH in BV is typically elevated above 4.5, which is higher than the normal acidic pH of the vagina. The fishy odor on the KOH mount is also a diagnostic feature of BV, as the alkalinity of the KOH solution triggers the release of volatile amines from the anaerobic bacteria.
**Why Each Wrong Option is Incorrect**
* **Option A:** A vaginal fluid pH > 6 is more consistent with trichomoniasis, not BV. Additionally, increased para basal cells are not a diagnostic feature of BV.
* **Option C:** A vaginal fluid pH > 4 is within the normal range, and the presence of hyphae on KOH mount is characteristic of candidiasis, not BV.
* **Option D:** Motile trichomonads on microscopy are diagnostic of trichomoniasis, not BV. The vaginal fluid pH in trichomoniasis is typically acidic, not elevated.
**Clinical Pearl / High-Yield Fact**
BV is often associated with an increased risk of preterm labor, spontaneous abortion, and pelvic inflammatory disease. It is essential to diagnose and treat BV promptly to prevent these complications.
**✓ Correct Answer: B. Vaginal fluid pH > 4.5, presence of clue cells on the smear and fishy odor on KOH mount**
✓ Correct Answer: B. Vaginal fluid pH > 4.5, presence of clue cells on the smear and fishy odor on KOH mount
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